diff --git a/mistletoe/span_tokenizer.py b/mistletoe/span_tokenizer.py
index e60498f..4e7a1da 100644
--- a/mistletoe/span_tokenizer.py
+++ b/mistletoe/span_tokenizer.py
@@ -64,7 +64,7 @@ def eval_new_child(parent, child):
 
 def relation(x, y):
     if x.end <= y.start:
-        return 0      # x preceeds y
+        return 0      # x precedes y
     if x.end >= y.end:
         if x.parse_start <= y.start and x.parse_end >= y.end:
             return 2  # x contains y
diff --git a/test/samples/syntax.md b/test/samples/syntax.md
index dd71047..4442b81 100644
--- a/test/samples/syntax.md
+++ b/test/samples/syntax.md
@@ -298,7 +298,7 @@ Quote Level from the Text menu.
 
 Markdown supports ordered (numbered) and unordered (bulleted) lists.
 
-Unordered lists use asterisks, pluses, and hyphens -- interchangably
+Unordered lists use asterisks, pluses, and hyphens -- interchangeably
 -- as list markers:
 
     *   Red